Ebola outbreak ravages West Africa

Ebola has killed more than 10,000 people in Guinea, Liberia and Sierra Leone, and the United Nations says those numbers are vastly under-reported.

MONROVIA, LIBERIA - FEBRUARY 2: A health worker speaks with a participant in the Ebola vaccine trials, which were launched at Redemption Hospital, formerly an Ebola holding center, on Feb. 2, 2015 in Monrovia, Liberia.

The largest recorded Ebola outbreak in history has led the U.S. Peace Corps to evacuate hundreds of volunteers from three affected West African countries, according to a State Department official.

Ministers in West African states say they lack the resources to battle the world's worst outbreak of Ebola and deep cultural suspicions about the disease remain a big obstacle to halting its spread.

There is no cure for the virus and no vaccine, but care from medical workers so far has helped sustain the lives of nearly half of those stricken.

Health workers are working tirelessly to obtain blood samples for Ebola virus testing in screening tents in Monrovia, Liberia, among other places.

Two U.S.-based missionary groups have ordered the evacuation of their non-essential personnel from Liberia after a doctor and a missionary both contracted Ebola.

Patients are quarantined. Liberian security forces, part of the country's Ebola Task Force, enforce a quarantine on the West Point slum on August 20, 2014 in Monrovia, Liberia.

Senior Matron Breda Athan demonstrates the procedure when preparing to treat potential patients with Ebola on Aug. 12, 2014 in London, England. The Royal Free Hospital houses two High Level Isolation Units at their High Secure Infectious Disease Unit. The Ebola virus has already killed more than 1000 people in Africa